As others have said, it is worth trying to reduce the program to the
minimal version which reproduces your problem
(and then publishing it on https://go.dev/play/ ).
On Thursday, 24 November 2022 at 02:38:30 UTC kra...@skepticism.us wrote:
> You cannot mutate strings. Your code is also missing a final close-brace
> and possibly has other problems. That your example includes commented out
> code is also problematic. As Nikhilesh Susarla pointed out you should post
> a link to the Go playground to avoid any ambiguity.
>
> I added the missing close-brace to your code and observed the following
> behavior (I entered "1" at the prompt):
>
> > go run x.go
> 144.6 ms
> State where the hash counter should begin:>> 1
> panic: runtime error: invalid memory address or nil pointer dereference
> [signal SIGSEGV: segmentation violation code=0x2 addr=0x28 pc=0x102536674]
>
> This tells me there is a fundamental bug in your code having nothing to do
> with "Problems with array slicing reliability"
>
> On Wed, Nov 23, 2022 at 1:56 PM Mucas Schlack <loji...@gmail.com> wrote:
>
>> Hello Golangers!
>> Is there anyone who can test the reliability of the following Golang
>> slice feature? I am using an AMG64 computer with Windows 10, and Go version
>> 0.36.0. When I use the following code, to detect and then replace a
>> character at any given length *n* (9) in a string with an Uppercase
>> Character. Strangely and somehow, the slice pointer will move to another
>> position even though the code is not dynamic and has not changed. Is there
>> anyone who can trouble shoot this code for me?
>>
>> Please remember that this is "*test*" code only, so some of it will not
>> make any sense or work. It is only "proof of concept" code.
>>
>> The code to pay attention to is the following - from lines: 80 - 92!
>>
>> Many thanks for any help you can give!
>>
>> Mucas
>>
>> Example code:
>>
>> package main
>>
>> import(
>> //"unicode/utf8"
>> "math/rand"
>> "strconv"
>> "strings"
>> "fmt"
>> "time"
>> "os"
>> )
>>
>> var alphanumerics = [62] string {
>>
>> "a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z",
>> "0","1","2","3","4","5","6","7","8","9",
>>
>> "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z",
>> }
>>
>> func main(){
>>
>> var (
>> txtflpth string = "C:\\Workspace\\Transaction Hash.txt"
>> flNm string = "Transaction Hash.txt"
>> CRLF string = "\n"
>> cntstrt string
>> AuthKey string
>> NwStr string
>> cstart int
>> cntr int
>> flEx *os.FileInfo
>> flEx2 *os.File
>> trfl *os.File
>> err error
>> )
>>
>> fmt.Print("State where the hash counter should begin:>> ")
>> fmt.Scanln(&cntstrt)
>>
>> if cntstrt == "" || cntstrt == " " {
>> trfl, err = os.Create(flNm)
>>
>> if err != nil { panic(err); os.Exit(-1) }
>> defer trfl.Close()
>>
>> } else {
>> var flEx, err = os.Stat(txtflpth)
>>
>> fmt.Println(flEx.Mode().String)
>> //fmt.Println(flEx.IsRegular())
>> fmt.Println(flEx.IsDir())
>> fmt.Println(flEx.Name())
>> fmt.Println(flEx.Size())
>> fmt.Println(flEx.Sys())
>>
>> if err != nil { if os.IsNotExist(err) { panic(err) } }
>>
>> cstart, err = strconv.Atoi(cntstrt)
>> flEx2, err := os.Open(txtflpth)
>> defer flEx2.Close()
>> }
>>
>> /*defer func(
>> if err == trfl.Close() || err == os.IsNotExist(err)!= err {
>> panic(err) }
>> if err == flEx.Close() || err == os.IsNotExist(err)!= err {
>> panic(err) }
>> )*/
>>
>> if cntstrt != "" && cntstrt != " " { cntr = cstart }
>>
>> for cntr = cstart; cntr < cstart + 1000; cntr++ {
>> NwStr = ""
>> AuthKey = NwStr
>>
>> for i := 0; i <= 65; i++ {
>> time.Sleep(10 * time.Nanosecond)
>> rand.Seed(time.Now().UnixNano())
>> AuthKey = AuthKey + alphanumerics[rand.Intn(62)] //, [A - Z],
>> [0-9])
>> }
>>
>> var hashRemap = [...] string {"A","U","G","D","E","X"}
>>
>> AuthKey = "0x" + AuthKey
>> fmt.Println("Transaction Hash: " + strconv.Itoa(cntr) + ") " +
>> AuthKey)
>> //AuthKey2 := []rune(AuthKey)
>>
>> StrPos := strings.Index(AuthKey, AuthKey[9:10])
>> fmt.Printf("The old character %s is at string position: (%d) " +
>> CRLF,AuthKey[9:10], StrPos)
>> //os.Exit(1)
>>
>> for i := 0; i < 6; i++ {
>> switch i {
>> case 0: AuthKey = strings.Replace(AuthKey,AuthKey[9:10],
>> hashRemap[0], 1); fmt.Println("Replaced! The New Transaction Hash: " + "("
>> + strconv.Itoa(i) + ") " + AuthKey); os.Exit(1);
>> case 1: AuthKey = strings.Replace(AuthKey,"",
>> hashRemap[1], 1)
>> case 2: AuthKey = strings.Replace(AuthKey,"",
>> hashRemap[3], 1)
>> case 3: AuthKey = strings.Replace(AuthKey,"",
>> hashRemap[4], 1)
>> case 4: AuthKey = strings.Replace(AuthKey,"",
>> hashRemap[5], 1)
>> case 5: AuthKey = strings.Replace(AuthKey,"",
>> hashRemap[5], 1)
>> }
>>
>> }
>>
>> fmt.Println("Transaction Hash: " + strconv.Itoa(cntr) + ") " +
>> AuthKey)
>> if trfl != nil { trfl.WriteString("Transaction Hash: " +
>> strconv.Itoa(cntr) + ") " + AuthKey + CRLF) }
>> if flEx != nil { flEx2.WriteString("Transaction Hash: " +
>> strconv.Itoa(cntr) + ") " + AuthKey + CRLF) }
>>
>> --
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>>
>> <https://groups.google.com/d/msgid/golang-nuts/f27c55aa-836a-453e-a013-a7b752de273bn%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>>
>
>
> --
> Kurtis Rader
> Caretaker of the exceptional canines Junior and Hank
>
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